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When tiny wastes are cumulating, a huge and invisible waste will be created. Have you ever notice that every time when you cutting pencil lots of pencil lead is wasted, so this design will help people reuse these pencil lead.
When you cutting pencil the powder of pencil lead will settle to bottom naturally and a meshwork inside Ball-pencil sharpener will separate it from the bits of wood, then a round structure will help you to paint the pencil lead onto paper.
Chengyuan Wei, Jiang Wu, Guanyun Wang, Ning Zhang